Head circumference

Mamas: I’m still so concerned with my babies head circumference. It jumped from 70% to 92% from her 6 month to her 9 month appointment. But her height and weight are only 15 and 20%. Does anyone else have a huge jump in head circumference from 6 months to 9 months? Is your doctor worried? — google leads me down the road of autism. Which we have other concerns about that. I don’t know why with this being my second. But im so worried something is wrong. Or will be.